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Cited by 443

The DOI matches its Crossref record; 32 of the 32 references it cites were found in a registry or an index.

Formation of a Spiral Galaxy in a Major Merger

Open access
Springel, Volker, Hernquist, Lars·2005·The Astrophysical Journal
DOI 10.1086/429486
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Abstract

We use numerical simulations to examine the structure of merger remnants resulting from collisions of gas-rich spiral galaxies. When the gas fraction of the progenitors is small, the remnants structurally and kinematically resemble elliptical galaxies, in agreement with earlier work. However, if the progenitor disks are gas-dominated, new types of outcomes are possible, where a prominent disk may survive in certain cases. To illustrate this scenario, we analyze an extreme example with progenitor galaxies consisting of dark matter halos, pure gas disks, and no bulges, as might be appropriate for mergers at high redshifts. While rapid star formation triggered by tidal torques during the merger forms a central, rotating bulge in the remnant, not all the gas is consumed in the burst. The remaining gas cools quickly and settles into an extended star-forming disk, yielding an object similar to a spiral galaxy and not an early-type galaxy. This is contrary to the usual view that major mergers invariably destroy disks. The morphological evolution of galaxies can therefore be more complicated than often assumed, and in particular, theoretical constraints based on the fragility of spiral disks need to be reevaluated.

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Metadata

Authors
Springel, V., & Hernquist, L.
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2005-02-16
Volume
622
Issue
1
Pages
L9-L12
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
DOI
10.1086/429486
OpenAlex
W2086949239
Cited by
443
References
32
FWCI
19.52
Type
journal article
Language
en
Open access
bronze

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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